Include third-party django-confirmation library.

Taken from http://code.google.com/p/django-confirmation/.

Code is under the BSD 3-clause license.

(imported from commit cfb5a511097fe14fba7f1bcea62dfa25cfb58622)

confirmation/util.py

@@ -0,0 +1,12 @@
+# -*- coding: utf-8 -*-
+
+# Copyright: (c) 2008, Jarek Zgoda <jarek.zgoda@gmail.com>
+
+__revision__ = '$Id: util.py 3 2008-11-18 07:33:52Z jarek.zgoda $'
+
+from django.conf import settings
+
+def get_status_field(app_label, model_name):
+    model = '%s.%s' % (app_label, model_name)
+    mapping = getattr(settings, 'STATUS_FIELDS', {})
+    return mapping.get(model, 'status')